/*
 * Copyright 2010 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.google.android.apps.iosched.util;

import static de.google.android.apps.iosched.util.ParserUtils.AtomTags.HREF;
import static de.google.android.apps.iosched.util.ParserUtils.AtomTags.LINK;
import static de.google.android.apps.iosched.util.ParserUtils.AtomTags.REL;
import static de.google.android.apps.iosched.util.ParserUtils.AtomTags.TITLE;
import static de.google.android.apps.iosched.util.ParserUtils.AtomTags.UPDATED;
import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT;
import static org.xmlpull.v1.XmlPullParser.END_TAG;
import static org.xmlpull.v1.XmlPullParser.START_TAG;
import static org.xmlpull.v1.XmlPullParser.TEXT;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import android.text.format.DateUtils;

import java.io.IOException;

public class WorksheetEntry
{
	private static final String REL_LISTFEED = "http://schemas.google.com/spreadsheets/2006#listfeed";

	private long mUpdated;
	private String mTitle;
	private String mListFeed;

	public long getUpdated()
	{
		return mUpdated;
	}

	public String getTitle()
	{
		return mTitle;
	}

	public String getListFeed()
	{
		return mListFeed;
	}

	@Override
	public String toString()
	{
		return "title=" + mTitle + ", updated=" + mUpdated + " (" + DateUtils.getRelativeTimeSpanString(mUpdated) + ")";
	}

	public static WorksheetEntry fromParser(XmlPullParser parser) throws XmlPullParserException, IOException
	{
		final int depth = parser.getDepth();
		final WorksheetEntry entry = new WorksheetEntry();

		String tag = null;
		int type;
		
		while (((type = parser.next()) != END_TAG || parser.getDepth() > depth) && type != END_DOCUMENT)
		{
			if (type == START_TAG)
			{
				tag = parser.getName();
				if (LINK.equals(tag))
				{
					final String rel = parser.getAttributeValue(null, REL);
					final String href = parser.getAttributeValue(null, HREF);
					
					if (REL_LISTFEED.equals(rel))
					{
						entry.mListFeed = href;
					}
				}
			}
			else if (type == END_TAG)
			{
				tag = null;
			}
			else if (type == TEXT)
			{
				final String text = parser.getText();
				
				if (TITLE.equals(tag))
				{
					entry.mTitle = text;
				}
				else if (UPDATED.equals(tag))
				{
					entry.mUpdated = ParserUtils.parseTime(text);
				}
			}
		}
		
		return entry;
	}
}
